react js interview questions for experienced

React interview questions

Here are some React.js interview questions that are commonly asked to experienced developers:

1. What is React.js, and how does it differ from other JavaScript frameworks?
2. Explain the concept of Virtual DOM in React and how it improves performance.
3. What are the key features of React?
4. What is JSX in React? How is it different from regular JavaScript?
5. Explain the component life cycle methods in React and when they are invoked.
6. What are React Hooks, and how do they differ from class components?
7. How does state differ from props in React? When would you use one over the other?
8. Explain the concept of higher-order components (HOCs) in React.
9. What is the purpose of the “key” prop in React? Why is it important?
10. How does React handle forms and form validation?
11. What is the significance of the “setState” method in React? How does it work?
12. How can you optimise performance in React applications?
13. Explain the concept of React context and when you would use it.
14. How does React handle routing? What are some popular routing libraries used with React?
15. Describe the concept of reconciliation in React and its significance in rendering components.
16. What are the differences between controlled and uncontrolled components in React?
17. How would you handle error boundaries in a React application?
18. Describe the concept of code splitting in React and its benefits.
19. What are React Fragments? Why are they useful?
20. How would you perform server-side rendering (SSR) with React?

If you want answers of these question visit sudheerj post on github repository

These questions cover various aspects of React.js and are designed to assess your knowledge and experience with the framework. It’s a good idea to review these topics and ensure you have a solid understanding of React.js concepts and best practices before your interview.